US1467536A - Riveting machine - Google Patents

Description

Sept. 11, 1923. 1,467,536

n 4. C. DORNIER RIVETING MACHINE Filed June 28. 1924) '4 Sheats-Shet 1 A INVENOR= Sept. ll, 1923. l,467.536

` c. DORNIER RIVETING MACHINB f Filed June 28 1920 4 Sheets-Sheet 2 INVENTOR= Se t. 11, 1923. Msmse C. DORNIER RIVETING MACHINE Filed June 28 1926 4 stmata-Sheet 5 NVENT R Sept. 11, 1923. 1,467,536

C. DORNlER RI ETING MAGINB Filed June 28 20 4 shows-Sheet ,4.

l 61? of ff Ma al NVLNTOR Patented Sept. 11,1923.

rr rs CLAUDE DORNIER, OF FRIEDRICI-ISHAFEN, GER-TANY, ASSIGNOR TO THE FIRIVI DOR- NIER-METALLBAUTEN, GESELLSCAFT MIT BESCI-IRNKTER HAFTU'NG, OF PRIED- R-ICHSHAFEN, A. B., GERMANY.

RIVETlNG MACHINE.

Application filed June 28, 1920 Serial No. 392,560.

To all whom Z't mag Concern:

Be it known that I, CLAUDE: DoRNIEn, a citizen of the German Empire, residing at Friedrichshafen a/B., Germany, have invented certain new and useful Improvements in Riveting Machines, of Which the following is a specification My invention reters to the manufacture of rivetine connections and concerns a machine allowing to automatically produce riveted plate seams of any length.

The machine forming the object of the present invention and the Working process obtained by its means can be applied to riveting of any pit ch required, but special advantages are ofl ered -in producing thinwalled small-pitch rivetinr connections. For 'by employing this machine closed or open bar-shaped hollow bodies of any length and of Very thin plate can be made, Which are remarkable 'for their great accuracy of pitch sometimes not wider than a few millimeters and for the particularly high resistance o't their Sections. To obtain sections of equal moments ol' inertia (as such are produced by this peculiar automatically progressing rivetin; in rows by means of a machine according' to the invention) is impossible with rolled profiles to be had in the trade until now, since their sections are as far as their manufacture is concerned, subject to certain limitations not applying to the present process.

Thus the object ol the invention is a machine for prmlucin long riveted plate scams and especially riveted sectional bars, in which the parts that are to be connected enter the machine uupunched. and are under permanent inthlence o't' a l'eed appliance autoinatically and continuously (lriven by the machine according' to the .required pitcll. loreover in a rythmically moving' slide all tools are combined, which are needed for n nchin 'for introducing the rivet shat't into its hole and for finishing the connection by shaping the head.

In the 'further course of perfection of this invention in the joint slide another tool has been provided for thin plates, Which adiusts the. small rivet shafts asto their position relatively to the thinplates to berv eted and secures them in adjusted position by a moderate clenching.

Furthermore the machine has been arranged so that either at .regula-r intervals or in individual cases required holes punched e. g. for fastening struts Or Other connections later on may be left unriveted on sectionalbars having a length of about 7.5 In. and 12.5 mm. riveting pitch, the bending bars to be described later being left out, it has been ascertained thatpunching alone'eaused the bar to warp to a-'rise 'of 250 mm., punchino; and rivetin'gr toa rise of 500 mm.; this proves that punching` and riveting participate :fairly 'equally in Stretching and bending.

Further experiments have been made to the end o't passing the bars through the machine and thereby producing' an artificial countenbend, some others being' treated without bending. F or this purpose four bendlng bars \vere pr0v1ded two of Which were arranged Within' the punching and.

riveting tools'and twooutside. In the firstcase these four bendinp bars were employed Simultaneously` the ones outside projectin about 1.5 mm. tarther than those inside. In

the second Case the outside bars \vere left out altogether. In the first case the punched and riveted bar lett the machine straight inthe second case with a warp ot' 120 mm. rise. In this manner the success of an articial counter-bend was proved.

An arrangement of the machineespecially useful 'for Very long' rows of rivcts consists according to the invention In USInfI t'orthe feed motion of the parts undergomg the riveting a screw spindle reversible as to. the general transport motion. In spite thereof with small pitches comprising e. g. a few centlmeters or even inllllmeters only and With rivetlng scams severalmeters long the prescribed distancebetweea the tirst and the last rivet hole can be approXimately maintained only on account of the unavoidable Stretching. In some cases this. does not matter; but when the highest ac-- curacy is required, as e. g. in making boom. members and girders for air craft, the' Stretching of the material caused by the: punching and riveting process must be taken into consideration.

In developing' this nvention further this: is effected in an especially simple manner meeting all Other requirements by influencing the feed appliance by a compensating" arrangement, which in progressing automatically compensates the small deviatlons' from the pitch caused by the Stretching of the material during` punching and riveting' and differing according to the material and to the chosen shape of profile or number and distribution of the rows of rivets.

In the drawings aflixed to this specifica-- tion and forming part thereof, a modifica-- tion of a riveting machine according to the present invention iS illustrated by Way of example. This is a machine especially suited for producing riveted hollow girders possessing walls Very thin as compared to theother dimensions of the section. It has been assumed that a boom member destined for air craft and highly accurate is to be made by means of two continuous scams of riVets: from two sectional strips of thin steel plate.. The machine to be described shows all peculiarities previously mentioned and some more, Which are comprised within the range of the invention.

In the drawingsz Fig. 1 is a longitudinal front 'View of the ]Middle part of the complete machine,

Fig. 1 is a sectional View of the feed mechanism on the line 1`* -1 in Fig. 2.

Fig. 2 is a plan, partly in section along line 2-2 in Fig. 1.

Fig. 3 front View onlarged in comparison to Fig. 1 and showing' the part of the machine where the compensating appliance is treated.

Fig. 1- is the corresponding plan,

Fig. 5 a section along line 5-5 in 4, again on a larger Scale.

Fig. 6 a longitudinal sec-tion along 6-6 in Fig. lshowing a detail.

Fig. 7 a transversal section along 7-7 in Figs. 3 and 6.

Figs. S and 9 are Vertical partial sections along lines 8-8 and 9 9 in Fig. 2 on a larger Scale.

Figs. 10-12 details of the riveting machine on a' highly enlarged Scale.

Fig. 13 a section across a profile strip immediately before riveting.

Fig. 14: on a larger Scale a longltudinal View corresponding to Figs. l and 2 of the part of the machine cemprising the means employed for producing the counterbend line line

.and the individual tools for punching the profile bar, for introducing, adjusting and firstly clenching the riVet and for Shaping 'the head.

Fig. 15 a corresponding plan.

Fig, 16 a Vertical section along line 16 16 in Figs. 14 and 15.

Figs. 17 and 18 a: diagram of the working process of the machine.

One of the chief parts of the combined :machine shown in the drawings is the actual riveting machine A containing the tools for punching the profiled steel plate strips, for 'introdueing and cutting off the riveting material in wire-shape, for introducing the rivet shafts into the riVet holes` for adjusting the riVet shafts and for finishing the riveting connection, and besides containing the parts operating the feed motion. An other chief part of the combined plant is formed by a machine bed B extending about equally far on both sides of the riveting machine A; this bed serves to support the most essential parts of the feed motion, the appliances for producing an absolutely eX- act pitch and as a general bearing and support of the unpunched plate strips and of the riVeted profile bar. The middle tableshaped part of the machine bed B is rigidly connected with the riVeting machine. Here 'there are arranged most of the appliances securing a good joining and introducing of the unpunched profile strips into the riveting machine and the appliances counter-acting the one-sided Stretching of the plate caused by the punching and riveting and generating a turning or twisting of the finished profile bar.

The intrnsc riveting machine A is in its outer appearance and in its work substan tially Very much like the eccentric presses or punches known, but shows as compared to these certain peculiarities important for the exploitation of the idea of the invention: on guide bars (7 there glides a main slide C,

which is connected by means of aunivcrsal joint with a main eccentric a? arranged on the dri ing shaft .Tn the main slide C an auxiliary slide D is guided which is driveuby an auXiliary eccentric (6 arranged also upon driving' shaft The auxiliary Slide governs the Vertical motion of a plate clamp E fitted with three thumbs 6 and serving to clamp the plates during the punching and'riveting. In order to allow for the varying properties of the material of the profile strips F to be riveted and for the Variable pitch, the plate clamp E is not rigidly connected with the auxiliary slide D. as can be gleaned from Figs. 10-12.

'It is guided laterally by a tool holder E Which due to a horizontal guiding groove C provided in the main Slide C can be Shifted laterally Within certain limits, but after being adjusted is rigidly fastened to the main slide C by a set-screw R and thus forms with it a unit. The upper part of the plate clamp E is inserted in the front part d of the auxiliary slide D, in which Some space is provided for this purpose, so that it is positively entrained in every upward stroke of the latter. On the other hand it is influenced by springs S also arranged in the front (i of the auxiliary slide D and acting on a transmission plate S These tend to press the plate clamp E permanently downwards and during the down stroke of the auxiliary slide press the profile strips F together elastically or press them upon some abutment 6 The latter is arranged upon a table-shaped top plate A of the riveting machine and allows of being shifted sideways.

The substantially tube-shaped plate clamp E and its abutment 6 serve at the same time for receiving a punch E which at the bottom is guided accurately in the lower part of the plate clamp, on top in an interchangeable guiding plate 6 resting on the tool holder E The upper end Of the punch E is formed with a head 6 'pressed against' an upper pressure face GG of the tool holder E by a spring T pressing from underneath. Thus the eXtraeting of the punch fron'i the punched profile strip F is not effected rigidly but elastically. All other parts of the punch are somewhat thicker .than its free bottom end, which does the punching. As the shaft is comparatively long the thin punching end cannot run out. On the other hand there is no danger of jamming and thus of a breaking of the punch supported on the one hand in the main slide C or in the guide plate 6 rigidly connected with this during working and on the Other hand in the plate olamp E possessing a Comparative motion relatively to it. Thus it is possible to punch thousands of rivet holes of 2 OI' less millimeters diameter in high class steel before the punch wants renewing.

As soon as in the up-stroke of the auxiliary slide D the profile strips F shortly before relieved from the punch E are no more under the elastic pressure of the plate clamp E, they are shifted the distance of one rivet at a time from right to left (referring to Figs. 1. 2, 3, 4) by some device described later. In order to simplify the drawing, a rivet hole is assumed to be just in the position needed for introducing the rivet shaft.

A short distance behind this rivet hole (Figs. 1, 2 and 9), which in the modification illustrated has a (listance latcrally of two pitchunits from the p'unch Ethe tableshaped top plate A possesses a slender slightly conical opening (L Its upper part is formed referably by a noZZle inter- Changeable (not shown in the drawing) Which has a bere orrespondng to the diameter of the wire. The opening (t continues downwards 'in case A. and serves as guiding channel for a riveting wire G running off a reel G arranged in the bottom of the riveting machine. A push clamp G controlled by an eccentrie (6 and a transmission rod pushes upwards in each stroke a piece of the wire G corresponding to the required shaft length. Above the push clamp the riveting wire G is lead through a stretching appliance r constructed at the same time as an arresting appliance acting from one side. b

' For Cutting ofl" and transporting the wire bit used as rivet shaft a knife Gr" isprovided which is shaped as a fla-t slide (Figs. 2 and 9)` whose motion is commanded from driving shaft (1 by means of agear fl ln the position of rest of the knife (Fig. 9)"an opening made for receiving the free wire end is disposed eXactly above the conical opening (T so that the wire pushed upwards by the push clamp G meets with no resistance. During the ensuin'g up-stroke of rod (7 the knife G is shifted forwards, cuts ofl" the wire end and transports it to immedii ately above the rivet hole mentioned above of profile Strip F. lVhile then the knife does not move for a while, the main slide C sinks down. In' its guiding groove'c it has a holding piece G with an. inserted pin G The pin presses the Cut-off wire bit from the opening of the knife into the rivet hole undernezith and then is entrained by the main slide going up, while knife G is pulled bacl'so as to Cut ofl' another bit during the next strolre of the machine. To prevent the rivet shaft which is in no way clenched until nowfroin falling out, the top plate A has a guide bar (t narrowly underneath the, profile strips F.

When the next feed stroke the pair of profile strips with the rivet'shaft has advanced another rivet distance, the rivet shaft comes within reach of a straightening and clenching tool H and 'H acting fromiboth sides i. e. from above and from underneath. The upper and lower part of this tool are hollowed out like a Cup and when moving towards each other straighten and afterwards clenCh the rivet shaft from both ends in its right position relatively to the Dlates.

After another feed movement the slightly clenohed rivet shaft comes within reach of a lieader made in two parts.

n the Construction illustrated (especially Figs. 1, 2` S and 14) both tools are shaped very similarly as to their Original outward appearance. The guiding groove 0 of the main slide C contains a tool holder H' in which, displaced one ri vet distance, a cleneher H and a header FR are inserted. At a Certaindistance below them there is an upholder H moving vertically in the top plate Showing a corresponding hole. It is fitted.

with the necessary counter forms for straightening and clenching and for heading the lower half of the rivet. Its working stroke directed' upwards is worked by a twoarm lever L as soon as its free end is pressed downwards by a governing bolt (6 (Fig. 8) arranged on the main slide C.

In order tokeep the unpunched profile strips in the correct mutual position also with relation to the tools just described, apart from the known and not shown sup port by Vertical and horizontal rollcrs (if required by rollers in slanting position as well) certain adjustable clamping appliances are provided. They consist of the clamping bolts J, three of which are schematically shown in Fig. 2, while in Fig. l they have been left out for clearncss' sake.

The clamping bolts encircle by their in terchangeable jaws fitted to match the individual profiles completely` or par'ly the unpunched and sometimes highly springlke profile strips and the first part of the riveted profile bar. They can be turned and shifted in many ways and are adjusted diffcrcntly to match the handled material. But invariably they are arranged so that not only the parts to be joined are cXactly underneath the tools, but that the profile Strips arrive underneath the tools with some side tension or counter-bend. This positive di viation from the straight line demanded in the finished work piece is done according to the invention by means of the adjustable clamping appliances, s-o that under the influence of the one-sided Stretching connected with punching and riveting a body is formed with a row of rivets running absolutely straight. The counter-bend is mostly rather Small, so that in Fig; 2 the mutual deviation of the aXes Of the three clamping bolts cannot be gleaned.

In order to ensure the even transportof the profile strips according to' the invention, all direct pulling or pushing of the profile strips by means of clamps, pinches, etc. has been avoided and the riveted profile bar is fed forwards by a separate pulling appliance.

The machine bed consists substantially of a long sturdy channeled girder B (Figs. l and 2), which is supported on both sides of the riveting machine A by supporting posts 13 and whose middle part is rigidly fastcned on the bottom side of the table of the riveting machine. In the girder B a sturdy screw spindle B of, a length equalling about half the length of the girder is shiftably but in general non-rotary supported. Both ends of the screw spindle B are fastened nOn-shiftably in a carriage B each. The carriage 13 can roll along the girder B by means of Wheels b In the left carriage the head end of the profile bar F is made fast under insertion of a compensatioudevice. To begin with,. the compensation device should be imagined to be out of action. Then thehead Of'the'profile baris in rigid connection with theleft hand carriage ]3 F or working the feed: motion a tooth wheel E rests underneath the girder B shortly before the riveting machine A. On the same shaft are arranged a ratchet Wheel b and a hand wheel b The former .is advanced by means of a pawl b carried by a link ?9 rocking about the aXle of Wheels b, 5 and anadjustable transmission gear b from a commanding shaft a at every strole of the machine. The screw spindle B? serving as a gear rack is driven forwards the distance of one rivet at every stroke and pulls the profile bar F to the left the same distanceby'means of the carriagc B.

It Would be very dificult or impossible to manufacture a real gear rack according to the processes used for the purpose which possesses an absolutely exactpitch on account Of its great length of 10 meters .and more. For this reason according to the 'invention a screw spindle has beenchosen, as into this a veryeXact thread can be Cut without any: great difficulties. Thus even in using a pitch of a few millimeters the greatest accuracy of the single rivet distances as an exact distance between the first and the last rivet hole is obtained. A further advantage consists in the fact that, When One side of the screw spindle is worn out, it can be turned a certain angle and thus a completely new gear rack is obtained.

If the screw spindle just mentioned is not to be used as gear rack, it can be employed as a compensation device, which in progress ing automatically corrects the minor faults of the pitch caused by the Stretching of the material during the punching and riveting and by similar sources of error. If e. g. the riveting vpitch be 20 mm. and there be a deviation of 0.03 mm. between two rivets, the figure is very small in itself, but accord ing to the very largenumber of rivets in a profile bar of. 10 meters the resulting deviation is 15 mm. Thus with long girders it is out of question to observe exact end dimensions. In order to obtain any required degree of accuracy as to end dimensions the screw spindle can be turned after every stroke of e. g. after 10 strokes of the main slide C by means of a separate ratchet gear for a certain amount in such a manner that the actual feed of the spindle is made as an average 0.03 mm. larger than it would' be without the turning motion of the screw spindle.

In the specimen construction this kind of compensation has not been employed, so that the comparatively heavy spindle ]ZV-which cannot easily be turned-rests generally nonrotary in carriage 13 The compensation is with it.

done instead by means of the appliance described in the following, which Scarcely requires any transporting work (Figs. 8.-7);

The left hand carriage ]3 (Fig. i) has about at the Centre height of the profile bar F a supporting rod K arranged in parallel to the spindle B upon which near its free end a guii ling piece K is rigidly fastened. n this guiding piece l a short draw-bar K rests, which by means of a bar-shaped extension I' is firmly connected with the head of profile bar F. On the 'front ond of dra`.v-bar K a nut M of a Inicromcter screw is arrangcd rotary but non-shit tably which partly forms a ratchet wheel. The bolt M belonging to this nut and equally arranged in parallel 'to the screw spindle B is rigidly tastened in the upper part of carriage B. \Vhcn nut M is turned relatively to the end ot the bolt fitted with thread m this nut M changes its distance from carriage 13 Upon nut M a driver M turns, which on the one hand possesses a pawl 'm and on the other hand a return pn m rigidly connected The return pin slides in the free end of a strong spiral spring m whose case m is rigidly connected with the Inicrometerscrew bolt M The spiral spring tends to press the return pn against a set-screw m (Fig. 7) serving as adjustable limiting piece provided in a limiting collar m which can be jammed upon the screw-bolt M y If'the return pin m rests against the set-screw m in its normal position, the driver M fitted with a roller m On its upper end slides along a guiding bar N on top, which is arranged in parallel to screw spindle ]3 above the part of girder B carrying the carriage 13 and eXtends over the whole length of this part of the girder. Bent bar supports n fastened atcertain intervals on girder B (on the left in Fig. 5) hold the guiding bar N in position. The guide bar has on its upper side at regular intervals, e. 100 mm., trapesoid bosses a Whenever the driver M in feeding hits against Such a boss with its roller m it is turned against the tension of Spring m a certain amount and carries the ratchet Wheel or nut M by means of the pawl 777, thus displacing the nut a little relatively to the screw-bolt M After passing the boss n the driver M is turned into home position by the return pin m under the tension of spiral spring 777 while the pawl glides over the ratchet wheel of nut M without feeding. It can be seen at once that in this way the profile bar F is displaced a little relatively to the screwspindle B at regular intervals corresponding to the intersections of guiding bar N by the bosses n Thus any deviation from the pitch caused by some reason Can be compensated with the accuracv required in rivet scams of any length. The compensation de' vice is otherwise constructed so that by its working the pitch can as well be enlargede. 'if the :feed has been-chosen insuficent- 'as also be reduced.

inventiou a special kind of supports have been provided, which according to the progressing ot' the profile bar inSeI't theinselves automatically and during the return motion ot the carriage, e. g. if a second or third row of rivets is to be made, are automati-j cally removed as well.

. For this purpose at intervals and out of reach of the carriage 13 (Fig. bent supporting posts O are rigidly fastened on the U-section B. Each supporting post has a pillar head 0 turning upon a Vertical aXis, whose lower end has an arm 0 for support- .ing the riveted profile strip. v It is now neces sary to swivel arm 0 which happens to be within reach of carriage B from its posi tion parallel to the screw spindle B into the position Vertical to it andthereby below the profile strip;

The pillar head has in its top portion two horizontal notches o standing perpendcular on One another. 'A 'bent support is fastened on post O, whose arm P is parallel to post O is at itsfree end changed into a spring rest p .A blade fspring 79 attached to this presses permanently a carrier T with roller t turning in the upper part of arm P upon the' pill'ar. head 0 It tends to hold the latter in either'of the two limit positions,

in which the notch O runs in parallel to screw-spindle ]3 while the other stands at right angles and serves as an abutment for the carrier T. Underneath the notches the pillar head is constructed in the shape ofan angular catch like the reverse catch of a planing machine, who se arIns 0 and 0' in parallel to either of 'the notches .o are arranged'in two planes one above the other. The arm parallel to screw spindle B e. g. 0 hits with its outer edge against a screw corresponding to it, e. g. p two of which are provided as adjustable Stops 79 and on spring rest p On the inner edge of this "arm 0 a driver pn (1 just tails to catch',

which is' combined with another driver pn 9 arranged somewhat farther below in a pin' holder Q. On the' pair of-driver pins 9 g a slide (Fig. 3) is fastened which possesses two slanting faces 9 The pn holder Q is `clamped tightly upon the free endof'the supporting rod K. The other arm 0 belng at right angles to the screw spindle 1s in the way of the second driver ping As may be seen fromfFig. 4 and '5, each of the catch arms 0 o is .in the home position shown in Fig. 4:, when the pair of driver pins 9 9 is on its right, i. e. between it and the riveting machine A. WVhen during the feed motion carriage 13 and With it the pair of pins g g and the slide Q1 moves to the left, the carrier T, after the carriage 13 has passed, is lifted by means of the slide q i. e. its left slanting face,.and of roller t from the corresponding notch 0 of the pillar head and thus this latter is released. Now the catch 0 0 is turned by the bottom driver pin 9 in the direction of the clock hand about 90, whereupon the carrier snaps into the other notch facing` it,' and thus secures it against being turned any further.

' The catch remains in this on position until carriage 13 after finishing a row of' rivets is being pulled back to the :right by means of hand wheel b or rather the pin holder Q always keeping in advance for the length of the supporting'rod K, which by means of the upper driver pin g turns it back into the home position shown in Fig. l.

` In parallel to arm 0 and pointing in the same direction a support 0 is clamped on pillar head 0 underneath the catches 0 o (Figs. 1 and 2), which preferably on its free end` has a supporting roller for the profile strip F; the roller is not shown in the drawing.` According to the description the supports s'wivel in and ont absolutely automatically and safely without any detrimental in fiuenee to the machine bed, to the feed appli ance or to the compensation device.

In all details of the who'le'machinery adjusting devices are provided where required which within certain limits given by the size of the machine and its special application allow to adapt it to the individual kind of riveting connections, which are to be made. Though the modification shown and described is especially destined for making thin- Walled riveted hollow bars; it may be employed without any substantial alteration for connecting large sheets Of plate by single or several rows of rivets. By a machine constructed correspondingly larger without any substantial modifications Of its Construction, riveting of structural parts can be done, as are used in the erection of buildings, in bridge constructions and in the construction of railway lines. It is not'diificult to manufacture e. g. girders and posts for ar-` chitecture, long-stretched booms: for bridges and shipbuilding and riveted frame parts for locomotives and other vehicles by means of a machine representing the object of the invention, because such a machine can always be put to great use where a large number of rivets have to be produced in continuons rows. i

If in a machine only a few. 'as it were, standardized pitches are usedl the separate tool holders which in the modification on the main slide, can -be combined in one tool holder for one pitch and equally the counter tools can be arranged on plates in- -terchangeable as a whole. The latter is esthe more complicated punching tool E is' two rivet distances apart from the introducing tool G If the pitch is reduced further, the distance between two tools following one another directly E G H and H can easily be chosen equal to twice the rivet distance, as shown in Fig. li The upper part of this figure corresponds to a partial view similar to thatin Fig. l and 14. The middle part signifies the arrangement of each one of the tools for punching, introducing, first clenching and heading by means of G/O, (LU, (LV, and (LO as an independent unit. The lower 'part shows a piece 'of a bar F, whose'pitch corresponds to half the distance of two tools following one another. It can be seen at once that some point of the bar happening to be arranged underneath a certain tool will get under the next tool after the second 'feed movement but that after setting 'the machine to work each tool comes into action once at every feed movement. \Vith small pitches and accordingly thin plates the velocity of.

riveting can even be enlarged e. g. doubled, if each. tool is provided twice in direct series corresponding to the threefold rivet distance and the feed is made twice the rivet distance.

This is proved by the' schematical Figure 18, which in the first line shows two identical tools E for punching (O), G for in-` trodueing (III), H for slightly clenching (V) and H for heading AS the series a, b 7), Q of the pitch nnderneath shows, the two tools of the same kind follow each other at three rivet distances, while the adjoining tools of different kinds have a distance of a single rivet. The triangle of figures shows that in the beginning (in position I) only Spot 1 is punched by the punch of series (L, while the punched Spot 1 and the unpunched spot 2 are below series and 7). After another feed movement of double rivet distance in' position III the spots 2 and 5 are punched simultaneously by the punching tools of series d and [l and into the punched Spot I a rivet shaft is introduced by the introducing tool of series e. The punched Spot 3 and the unpunched Spot 4: are below the rows (f and b reefrom tools.

After S feed movements of double rivet distance in position IX the spots 14 andl' are punched simultaneously, the holes 10 and 13 provided with a rivet shatt each, the rivet shatts ot' spots G and 9 are slightly clenchcd'and those of spots 2 and 5 headed, as the lower row shows by 'the non-hatched signs. In Spots 1 and 3 the heading` had taken place already in positions VII and VIII. After the next feed movement the rivets of spots at and 'T will be headed, those of spots 8 and 11 slightly clenched, those of spots 12 and 15 provided with rivet shaits and spots 16 and 19 punched, etc. Thus after each further feed movement of double rivet distance all eight tools work together in such a way that each time two rivets are made. Though tw o simultaneous rivetings are displaced for three units the individual pairs supplement each other s o'-as shown in Fig. 'LS-that a continuous riveting is done, as in position-VII the' rivet l, in position (VIII the rivet 3, in position IX the rivets 2 and 5, in 'the next position the rivets L and '7, then the rvets (3 and 9 etc. are finished.

Though the invention concerns in the first line the especially advantageous production of long straight lines of rivets, it can be ap glied at once to the production of rows of rivets, arranged in a circle. H for instance two junk rings are to be riveted upon one another, it is advisable to claiap them upon a Circular table rotary upon an aXle, whose distance 'troni the riveting machine can be varied, and commanded correspondingly by the l eed'motion of the riveting machine.

- Naturally the separate tools provided in the riveting machine must be arranged in the mantle face of the circle of the rivet holes made at the time, if they all are to work at every stroke of the machine. As in this case separate tool holders are needed for every riveting crcle and every pitch, it is advisable to provide the slide with an automatically turned revolving tool box, so ,that the individual tools work one after another. In a similar manner the idea of the mechanically progressing motion of the work piece, of its punchin, of the introduction of the riveting' wire and of finishing the riveting connection can be realized as well in rows ot rivets. in which the single rivet shafts have a radial direction. For straight rows of rivets the use of a revolving tool boX is equally teasible but apart from a few special cases less advantageous. as generally only one tool works at the same time and thus the riveting process is carried out somewhat slower.

Besides the drive of the tool slides can, instead of by means of eccentrics, be done in any other Way, e. g. by hydraulic action. On the Other hand the rivet holes need not, as in the modification described, be made by punching, but especially in thick plates they can be bored mechanically, if the material is to be treated especially tenderly.

In order to be able to leave out rivet holes in certain places, it is advisable to provide a disengaging device i'or the pnsh clamps (not shown in the drawings), so that the cutting and introducing appliance Strikes empty. Equally, it' the .material is not to be punched in certain places of the pitch, the punchingmachinery can be disengaged. li' between this and the counter face' of the main slide a removable presser piece is in serted, punching can be prevented most easily by removing it. But care has to be taken that simultaneously with setting the punching tool out oI" action the appliance for the introduction of the rivets is set out, of action too. If such passover places occur at regular intervals, when e. g. boom members are riveted which later on are to be united to some girder or lattice work by in- Serting filling bars, it is advisable to provide further governing devices, Which work automatically the engaging and disengaging of certain tools.

I wish it to be understood that do not desire to be limited to the exact details of construction shown and described for obvions modifications will occur to a person slilled in the art.

I claim:

1. Ina riveting machine in combination, a tool carrier adapted to reciprocate rel tively to the workpiece, means for automatihead forming' tool, a rivet inserting tool and a tool for adjusting and clenching the inserted rivet on said tool carrier. l

2. In a riveting machine in combination, a tool car ier adapted to reciprocate relatively to the Workpiece, means for automati cally carrying the workpiece step by step past said tool carrier` a punch, a rivet head forming tool, a rivet inserting tool and a tool for adjusting and Clenching the inserted rivet on said tool carrier and means in front of said tool carrier for slightly bending the workpiece.

3. In a riveting machine in combination, a tool carrier adapted to reciprocate relatively to the workpiece, means 'for automat ically carrying the workpiece step by stop past said tool carrier, a punch, a rivet head forming tool, 'a rivet inserting` tool and a tool for adjusting and clenching the inserted rivet on said tool carrier and means for compensating the elongation of the workpiece resulting from the punching; and riveting operations. i

4.. Ina riveting machine in combinatihn,

cally carrying the workpiece step by step l past said tool carrier and a punch.` a rivet ile a tool carrier adapted to reciprocate relatively to the Workpiece, means for automaticaliy carrying the Workpiece step by step past said tool carrier, a punch, a rivet head orniing tool, a riVet inserting tool and a tool for adjusting and cienching the inserted riret on said tool carrier and adj ustable guides gripping the Yy'orhpicce d s posed in 'front of said tool carrier so as to slightly bend the workpiece.

In a riveting machine in combination, a Workpiece carrier, a stationary scrcW spin die and means in gear with said spindlc for carrying said Workpiece carrier &long said. spindle. t

G. in a riveting machine ii combination, a tool carrier adapted to reciprocate relatively to the Workpiece, means comprslng a stationary screW spindle for autcmaicaily carrying the Workpece step by step past said tool carrier and a punch, a ]jiret head forming tool, a rivet inserting tool and a tool for adjusting and cienching the ir: serted rivet on said tool carrier.

In a riveting machine in combination, a tool carrier adapted to reciprocate relatively to the Workpiece, means for auto maticaily carrying the workpiece step by step past said tool carrier, a punch, a rivet head forming tool, a rivet inserting` tool and a tool for adjusting and clenching the inserted rivet on said tool carrier, a nut, means :for intermittentiy turning said nut and a screW belt in gear With said nut and connected With the Workpiece.

8. In a riveting machine in combination, a tool carrier adapted to reciprocate relatively to the workpiece, means for automaticaily carrying the Workpiece step by step past said tool carrier, a punch, :i rivet head forming tool, a rivet inserting tool and a tool for adjusting and clenching the insertcd rivet on said tool carrier and means for throwing one of said tools out at pre determined intervals.

9. In a riveting machine in combination, a tool carrier adapted to reciprocate relatively to the Workpiece, means for automatically carrying the Workpiece step by step past said tool carrier and a punch, a riVet head 'Orming tool, :a rivet inserting tool and a tool for adjusting and ,clenching the nserted rivet on said tool carrier, said tools being spaced apart for the distance of more than One step.

10. In a riveting machine in combination, a tool carrier adapted to reciprocate rea-- tively to the workpiece, means for automatically carrying the Workpiece step by step past said tool carrier and a punch. a rivet head formng tool, a rivet insertiug tool and a tool vor adjusting and clenching the inserted rivet on 'said tool carrier, part of said tools being provided in a plurality of specimens and being spaced apart 'for the distance of more than one step'.

11. In a riveting machine in combination, a tool carrier adapted to reciprocate relatively to the workpiece, means for automaticaily carrying the Workpiece step by step past said tool carrier, a punch, a rivet head forming tool, a rivet inserting tool and a tool for adjusting and clenching the inscrted rvet 'on said tool carrier, and Workpiece supporting members movably arranged in the pat-h of the work-piece.

12. In a rveting machine in combinaticm, a tool carrier adapted to reciprocate rcla tively to the Workpiece, means for autematically carryingthe WOrkpiece step by step, past said tool carrier, a punch, a rivet head forming tool, a rivet inserting tool and a tool for adjusting and clenching the inserted rivet on saidtool carrier, Workpiece supporting members arranged near the path of the Workpiece and means 'for temporarily throwing Said members in Operative pos-` tion, When the Work advances.

In testimony Whereof I affiX my Signature.

CLAUDE DORNIER.

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